70% of Zcash Is Exposed to Quantum Risk, and a Deadline Just Landed

70 percent of all Zcash sits in addresses a quantum computer could one day target, and developers just set a deadline to fix it.

Zakura engineer Roman Akhtariev says post-quantum signature opcodes are planned for January 2027, a development target rather than a confirmed activation date. About 11.96 million of the 16.98 million coins issued are held in transparent addresses, and the proposed hash-based signatures use different math from elliptic curves, built to resist quantum attacks. Shielded coins are not covered in this first phase.

Markets are already nervous. $ZEC trades near 1,240 dollars, down about 12 percent over seven days after rallying toward 1,600 to 1,700 dollars, following a warning from Ethereum researcher Justin Drake about quantum and AI threats to wallet cryptography. No practical attack on wallet keys has been shown.

Quantum risk is becoming a real narrative across the sector. $BTC, $ETH, $STRK and $XMR holders are watching who ships protection first.